2 collectAnnTypeBinders, collectAnnTypeArgs, isAnnTypeArg,
6 mkPADictType, mkPArrayType,
7 parrayReprTyCon, parrayReprDataCon,
8 paDictArgType, paDictOfType, paDFunType,
9 paMethod, lengthPA, replicatePA, emptyPA, liftPA,
10 polyAbstract, polyApply, polyVApply,
11 hoistBinding, hoistExpr, hoistPolyVExpr, takeHoisted,
12 buildClosure, buildClosures,
16 #include "HsVersions.h"
27 import DataCon ( DataCon, dataConWrapId, dataConTag )
29 import Id ( mkWildId )
30 import MkId ( unwrapFamInstScrut )
33 import BasicTypes ( Boxity(..) )
38 import Control.Monad ( liftM, zipWithM_ )
40 collectAnnTypeArgs :: AnnExpr b ann -> (AnnExpr b ann, [Type])
41 collectAnnTypeArgs expr = go expr []
43 go (_, AnnApp f (_, AnnType ty)) tys = go f (ty : tys)
46 collectAnnTypeBinders :: AnnExpr Var ann -> ([Var], AnnExpr Var ann)
47 collectAnnTypeBinders expr = go [] expr
49 go bs (_, AnnLam b e) | isTyVar b = go (b:bs) e
50 go bs e = (reverse bs, e)
52 collectAnnValBinders :: AnnExpr Var ann -> ([Var], AnnExpr Var ann)
53 collectAnnValBinders expr = go [] expr
55 go bs (_, AnnLam b e) | isId b = go (b:bs) e
56 go bs e = (reverse bs, e)
58 isAnnTypeArg :: AnnExpr b ann -> Bool
59 isAnnTypeArg (_, AnnType t) = True
60 isAnnTypeArg _ = False
62 mkDataConTag :: DataCon -> CoreExpr
63 mkDataConTag dc = mkConApp intDataCon [mkIntLitInt $ dataConTag dc]
65 isClosureTyCon :: TyCon -> Bool
66 isClosureTyCon tc = tyConName tc == closureTyConName
68 splitClosureTy :: Type -> (Type, Type)
70 | Just (tc, [arg_ty, res_ty]) <- splitTyConApp_maybe ty
74 | otherwise = pprPanic "splitClosureTy" (ppr ty)
76 isPArrayTyCon :: TyCon -> Bool
77 isPArrayTyCon tc = tyConName tc == parrayTyConName
79 splitPArrayTy :: Type -> Type
81 | Just (tc, [arg_ty]) <- splitTyConApp_maybe ty
85 | otherwise = pprPanic "splitPArrayTy" (ppr ty)
87 mkClosureType :: Type -> Type -> VM Type
88 mkClosureType arg_ty res_ty
90 tc <- builtin closureTyCon
91 return $ mkTyConApp tc [arg_ty, res_ty]
93 mkClosureTypes :: [Type] -> Type -> VM Type
94 mkClosureTypes arg_tys res_ty
96 tc <- builtin closureTyCon
97 return $ foldr (mk tc) res_ty arg_tys
99 mk tc arg_ty res_ty = mkTyConApp tc [arg_ty, res_ty]
101 mkPADictType :: Type -> VM Type
104 tc <- builtin paTyCon
105 return $ TyConApp tc [ty]
107 mkPArrayType :: Type -> VM Type
110 tc <- builtin parrayTyCon
111 return $ TyConApp tc [ty]
113 parrayReprTyCon :: Type -> VM (TyCon, [Type])
114 parrayReprTyCon ty = builtin parrayTyCon >>= (`lookupFamInst` [ty])
116 parrayReprDataCon :: Type -> VM (DataCon, [Type])
119 (tc, arg_tys) <- parrayReprTyCon ty
120 let [dc] = tyConDataCons tc
123 paDictArgType :: TyVar -> VM (Maybe Type)
124 paDictArgType tv = go (TyVarTy tv) (tyVarKind tv)
126 go ty k | Just k' <- kindView k = go ty k'
129 tv <- newTyVar FSLIT("a") k1
130 mty1 <- go (TyVarTy tv) k1
133 mty2 <- go (AppTy ty (TyVarTy tv)) k2
134 return $ fmap (ForAllTy tv . FunTy ty1) mty2
139 = liftM Just (mkPADictType ty)
141 go ty k = return Nothing
143 paDictOfType :: Type -> VM CoreExpr
144 paDictOfType ty = paDictOfTyApp ty_fn ty_args
146 (ty_fn, ty_args) = splitAppTys ty
148 paDictOfTyApp :: Type -> [Type] -> VM CoreExpr
149 paDictOfTyApp ty_fn ty_args
150 | Just ty_fn' <- coreView ty_fn = paDictOfTyApp ty_fn' ty_args
151 paDictOfTyApp (TyVarTy tv) ty_args
153 dfun <- maybeV (lookupTyVarPA tv)
154 paDFunApply dfun ty_args
155 paDictOfTyApp (TyConApp tc _) ty_args
157 dfun <- traceMaybeV "paDictOfTyApp" (ppr tc) (lookupTyConPA tc)
158 paDFunApply (Var dfun) ty_args
159 paDictOfTyApp ty ty_args = pprPanic "paDictOfTyApp" (ppr ty)
161 paDFunType :: TyCon -> VM Type
164 margs <- mapM paDictArgType tvs
165 res <- mkPADictType (mkTyConApp tc arg_tys)
166 return . mkForAllTys tvs
167 $ mkFunTys [arg | Just arg <- margs] res
170 arg_tys = mkTyVarTys tvs
172 paDFunApply :: CoreExpr -> [Type] -> VM CoreExpr
175 dicts <- mapM paDictOfType tys
176 return $ mkApps (mkTyApps dfun tys) dicts
178 paMethod :: (Builtins -> Var) -> Type -> VM CoreExpr
182 dict <- paDictOfType ty
183 return $ mkApps (Var fn) [Type ty, dict]
185 lengthPA :: CoreExpr -> VM CoreExpr
186 lengthPA x = liftM (`App` x) (paMethod lengthPAVar ty)
188 ty = splitPArrayTy (exprType x)
190 replicatePA :: CoreExpr -> CoreExpr -> VM CoreExpr
191 replicatePA len x = liftM (`mkApps` [len,x])
192 (paMethod replicatePAVar (exprType x))
194 emptyPA :: Type -> VM CoreExpr
195 emptyPA = paMethod emptyPAVar
197 liftPA :: CoreExpr -> VM CoreExpr
200 lc <- builtin liftingContext
201 replicatePA (Var lc) x
203 newLocalVVar :: FastString -> Type -> VM VVar
206 lty <- mkPArrayType vty
207 vv <- newLocalVar fs vty
208 lv <- newLocalVar fs lty
211 polyAbstract :: [TyVar] -> ((CoreExpr -> CoreExpr) -> VM a) -> VM a
215 mdicts <- mapM mk_dict_var tvs
216 zipWithM_ (\tv -> maybe (defLocalTyVar tv) (defLocalTyVarWithPA tv . Var)) tvs mdicts
220 r <- paDictArgType tv
222 Just ty -> liftM Just (newLocalVar FSLIT("dPA") ty)
223 Nothing -> return Nothing
225 mk_lams mdicts = mkLams (tvs ++ [dict | Just dict <- mdicts])
227 polyApply :: CoreExpr -> [Type] -> VM CoreExpr
230 dicts <- mapM paDictOfType tys
231 return $ expr `mkTyApps` tys `mkApps` dicts
233 polyVApply :: VExpr -> [Type] -> VM VExpr
236 dicts <- mapM paDictOfType tys
237 return $ mapVect (\e -> e `mkTyApps` tys `mkApps` dicts) expr
239 hoistBinding :: Var -> CoreExpr -> VM ()
240 hoistBinding v e = updGEnv $ \env ->
241 env { global_bindings = (v,e) : global_bindings env }
243 hoistExpr :: FastString -> CoreExpr -> VM Var
246 var <- newLocalVar fs (exprType expr)
247 hoistBinding var expr
250 hoistVExpr :: VExpr -> VM VVar
254 vv <- hoistExpr ('v' `consFS` fs) ve
255 lv <- hoistExpr ('l' `consFS` fs) le
258 hoistPolyVExpr :: [TyVar] -> VM VExpr -> VM VExpr
261 expr <- closedV . polyAbstract tvs $ \abstract ->
262 liftM (mapVect abstract) p
263 fn <- hoistVExpr expr
264 polyVApply (vVar fn) (mkTyVarTys tvs)
266 takeHoisted :: VM [(Var, CoreExpr)]
270 setGEnv $ env { global_bindings = [] }
271 return $ global_bindings env
273 mkClosure :: Type -> Type -> Type -> VExpr -> VExpr -> VM VExpr
274 mkClosure arg_ty res_ty env_ty (vfn,lfn) (venv,lenv)
276 dict <- paDictOfType env_ty
277 mkv <- builtin mkClosureVar
278 mkl <- builtin mkClosurePVar
279 return (Var mkv `mkTyApps` [arg_ty, res_ty, env_ty] `mkApps` [dict, vfn, lfn, venv],
280 Var mkl `mkTyApps` [arg_ty, res_ty, env_ty] `mkApps` [dict, vfn, lfn, lenv])
282 mkClosureApp :: VExpr -> VExpr -> VM VExpr
283 mkClosureApp (vclo, lclo) (varg, larg)
285 vapply <- builtin applyClosureVar
286 lapply <- builtin applyClosurePVar
287 return (Var vapply `mkTyApps` [arg_ty, res_ty] `mkApps` [vclo, varg],
288 Var lapply `mkTyApps` [arg_ty, res_ty] `mkApps` [lclo, larg])
290 (arg_ty, res_ty) = splitClosureTy (exprType vclo)
292 buildClosures :: [TyVar] -> [VVar] -> [Type] -> Type -> VM VExpr -> VM VExpr
293 buildClosures tvs vars [arg_ty] res_ty mk_body
294 = buildClosure tvs vars arg_ty res_ty mk_body
295 buildClosures tvs vars (arg_ty : arg_tys) res_ty mk_body
297 res_ty' <- mkClosureTypes arg_tys res_ty
298 arg <- newLocalVVar FSLIT("x") arg_ty
299 buildClosure tvs vars arg_ty res_ty'
302 lc <- builtin liftingContext
303 clo <- buildClosures tvs (vars ++ [arg]) arg_tys res_ty mk_body
304 return $ vLams lc (vars ++ [arg]) clo
306 -- (clo <x1,...,xn> <f,f^>, aclo (Arr lc xs1 ... xsn) <f,f^>)
308 -- f = \env v -> case env of <x1,...,xn> -> e x1 ... xn v
309 -- f^ = \env v -> case env of Arr l xs1 ... xsn -> e^ l x1 ... xn v
311 buildClosure :: [TyVar] -> [VVar] -> Type -> Type -> VM VExpr -> VM VExpr
312 buildClosure tvs vars arg_ty res_ty mk_body
314 (env_ty, env, bind) <- buildEnv vars
315 env_bndr <- newLocalVVar FSLIT("env") env_ty
316 arg_bndr <- newLocalVVar FSLIT("arg") arg_ty
318 fn <- hoistPolyVExpr tvs
320 lc <- builtin liftingContext
322 body' <- bind (vVar env_bndr)
323 (vVarApps lc body (vars ++ [arg_bndr]))
324 return (vLamsWithoutLC [env_bndr, arg_bndr] body')
326 mkClosure arg_ty res_ty env_ty fn env
328 buildEnv :: [VVar] -> VM (Type, VExpr, VExpr -> VExpr -> VM VExpr)
331 lc <- builtin liftingContext
332 let (ty, venv, vbind) = mkVectEnv tys vs
333 (lenv, lbind) <- mkLiftEnv lc tys ls
334 return (ty, (venv, lenv),
335 \(venv,lenv) (vbody,lbody) ->
337 let vbody' = vbind venv vbody
338 lbody' <- lbind lenv lbody
339 return (vbody', lbody'))
344 mkVectEnv :: [Type] -> [Var] -> (Type, CoreExpr, CoreExpr -> CoreExpr -> CoreExpr)
345 mkVectEnv [] [] = (unitTy, Var unitDataConId, \env body -> body)
346 mkVectEnv [ty] [v] = (ty, Var v, \env body -> Let (NonRec v env) body)
347 mkVectEnv tys vs = (ty, mkCoreTup (map Var vs),
348 \env body -> Case env (mkWildId ty) (exprType body)
349 [(DataAlt (tupleCon Boxed (length vs)), vs, body)])
353 mkLiftEnv :: Var -> [Type] -> [Var] -> VM (CoreExpr, CoreExpr -> CoreExpr -> VM CoreExpr)
354 mkLiftEnv lc [ty] [v]
355 = return (Var v, \env body ->
357 len <- lengthPA (Var v)
358 return . Let (NonRec v env)
359 $ Case len lc (exprType body) [(DEFAULT, [], body)])
361 -- NOTE: this transparently deals with empty environments
364 (env_tc, env_tyargs) <- parrayReprTyCon vty
365 let [env_con] = tyConDataCons env_tc
367 env = Var (dataConWrapId env_con)
368 `mkTyApps` env_tyargs
369 `mkVarApps` (lc : vs)
371 bind env body = let scrut = unwrapFamInstScrut env_tc env_tyargs env
373 return $ Case scrut (mkWildId (exprType scrut))
375 [(DataAlt env_con, lc : bndrs, body)]
378 vty = mkCoreTupTy tys
380 bndrs | null vs = [mkWildId unitTy]